I'm helping my adopted niece make a table runner for her family for Christmas. It will end up having 10-12 1/2 square triangles. I know that you add 7/8" to squares and sew on either side of the diagonal center line, but is that added to the end result of the squares or add on past the 1/4 " you normally have. I am cutting 2 1/2 " squares to end at 2 ". So do I cut 3 or 3 1/2 inch squares to make the triangles????
Any help would be appreciated----I told you would be shaking your head at me!